let f(x)=9x-2 and g(x)=√3x+7 find the domain of f and g 2.evaluate f(-2) f -1/3)

Answer 1

f is any old x BUT g will not work for x <0
9(-2) - 2 = ?
etc

Answer 2

assuming the usual carelessness with parentheses, and thus that g(x) = √(3x+7)
since the domain of √x is x≥0,
the domain of g is 3x+7 ≥ 0, or x ≥ -7/3

the domain of f, as with all polynomials, is all real numbers.